Assigkoe of one-half to



(No Model.)

R. KIRK. STEAM BOI LEB..

No. 279,396. Patented-June 12,1883.

UNITED STATES PATENT Orrictz.

w. n NsoN KIRK, or FORT scoTT, KANSAS, ASSIGNOR or ONE-HALF T w. J. MOORE, on SAME PLACE.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 279,396, dated June 12, 1883.

Application filed March 29, 1883. (No model.)

To 00% whom it may concern:

Be it known that LW. RANSON KIRK,of Fort Scott,in the county of Bourbon, and in the State of Kansas, have invented certainnew and use ful Improvements in Steam-Boilers; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, mak ing a part of this specification, in which- Figure 1 is a perspective view of my firebox separated from the shell or casing. 2 is a like view of the said shell, a portion of its wall being broken away to show theinte-' ri or construction and Fig. 3 is a vertical crosssection of one side wall of said fire-box and the adjacent wall of said shell, showing the means employed for securing the Same in relative position.

Letters of like name and kind refer to like parts in each of the figures.

The design of my invention is to enable a steamboiler having an inclosed fire-box. to be easily and quickly cleansed from sediment, scale, 8m; and to this end it consists, principally, in a steam-boiler composed of a shell and an inclosed firebox, which are separable and have their contiguous walls secured in relative lateral positions by means of sliding interlocking stay-bolts, substantially as and for the purpose hereinafter set forth.

It consists, further, in the fire-box and finesection, constructed and combined with the shell in the manner and for the purpose substantially as hereinafter shown. A

It consists, finally, in the construction'and combination of parts, substantially as and for the purpose hereinafter shown and described.

In the annexed drawings, A represents the fire-box portion, andA the flue portion,of the shell of a boiler which has the general form known as the "locomotive-boiler. The said parts A and A are united together in the usual manner, with their outer ends open, while the lower side of said fire-box part A is solid, instead of having the ordinary grateopenlng. A A

Fitted within the part A is a correspond ingly-shaped fire-box, B, which has such dimensions as to leave between its sides, top, bottom, and rear end and the contiguous portions of Said shell a water-space of usual lateral'dimensions. The front end of said part A is provided with an inwardly-proiecting ring, a, within which are secured a number of screw-studs, a, that project forward, while upon the front end of said fire-box is secured a similar ring, b, which extends outward over said ring a, and is provided with holes b for the passage of said studs. As thus constructed the firebox B is placed within the shell A. Rubber or other elastic packing is inserted between the front face of the ring (1 and the rear face of the ring I), and by means of nuts upon the outer ends of the studs (1 said rings are drawn closely together and asteanrtight joint produced at such point} In order that the walls of the shell A and fire-box B may be properly Supported to enable them to withstand the spreading action of; the steam, stay-bolts are required as in ordinary boilers; but an entirely different construction from that usually employed becomes necessary to permit of the ready separation of said parts. As seen in Fig. 1,1 provide at suitable points around said firebox rows ofradial belts or studs which extend lengthwise of the same from end to end, and have the ends of each row united by means of afiatbar, 1), that has such transverse dimensions as to cause it to form for each bolt a T-shaped head. Said bolts C have such length as to cause each of said bars D to occupy positions parallel with and at a short distancefrom the inner face of the shell A.

Secured upon the inner face of the shell A, in'a line radially with each bar I), is abar, E, which is provided within its inner face with a T-shaped groove, 0, that corresponds in transverse dimensions to the like features of said bar and its bolt 0, and receives and contains the same when the fire-box B is in position -.within said shell. The grooves c and bars D are made slightly tapering lengthwise, so that when the fire-box B is moved longitudinally to position said bars shall move easily until. near the rear limit of their motion, and when said fire-box is in position within the shell A shall closelyfit into and fill said grooves, so as to not only operate to rigidly confine in relative position the walls of said shell and firebolx', but also to prevent dirt and sediment from entering said groove. The stay-bolts thus arranged afford all necessary strength to the parts with which they are connected, and at the same time permit of the ready withdrawal. of the fire-box whenever such becomes i'lecessary, in consequence of which the separation of said fire-box from its shell requires but little time and involves no greater task than the removal of a fewnuts and the break- .ing of a gasketjoint.

The rear end of the firebox B isinclosed by the usual flue-sheet, 7)", within which are secured in the usual manner the front ends of flues F. The rear ends of said H u es are secured within a plate or flue-sheet, which has a diameterslight]ylessthanthe interior of the line portion A of the shell, and abuts against the inside of a ring that is similar to the ring of the section A, and is in like manner packed and bolted to the same.

\Vhen, now, it becomes necessary to clean the boiler, the rear flue-plate and the ring I) are unbolted and the fire box B and Iiues F drawn outward from the front end of the shell, a ltcr which each portion of said parts is readily accessible and can. be cleaned or repaired. It will be seen that to unite the parts of said boiler, and to render them for all practicable purposes the same as boilers of ordinary construction, it is only necessary that two plain easily-l'or1ned joints be made, one at the front end and one at the rear end ot' said boiler.

Having thus fully set forth the nature and merits of my invention,whatI claim as new is- 1. A steanrboiler composed of a shell and an inclosed firebox, which are separable and have their contiguous walls secured in relative lateral positions by means of sliding interlock ing stay-bolts, substantially as and for the purpose set forth.

2. The shell A, provided with the ring (1 bolts (1 and grooved bars E e, in combination with the firebox B, having the flange or ring I), stayliolts O, and connecting-bars D, sub stantially as and for the purpose shown and described.

3. In combination with the shell A and firebox B, constructed and combined as shown, the lines F, having their front ends secured within the flue-sheet I) of said fire-box, and 7 their rear ends secured within a flue-sheet, which is adapted to pass .into the flue portion A of said shell and to be bolted to. a ring attached to the rear end of the latter, substantially as and for the purpose shown.

In testimony that .I' claim the 'l'bregoing I have hereunto set my hand this 29th day of March, 1883. i

\V. HANSON KIRK.

Vitnesses XVILLIAM FITCH, HENRY (J; HAZARD. 

